Abstract
Chaos has been widely used in image encryption due to its rich properties. However, it remains an irreconcilable contradiction for security and implementation efficiency for image encryption schemes. In this paper, a novel chaos-based image encryption scheme has been proposed, where the Lorenz chaotic system is applied to generate pseudorandom sequences with good randomness, and a random switch control mechanism is introduced to ensure the security of the encryption scheme. Experimental results demonstrate the effectiveness and superiority of the algorithm.
Highlights
Mass data transmission on various communication networks has led to a security risk in multimedia data
Motivated by the above discussion, in this paper, we introduce the switch control mechanism into the chaos-based image encryption scheme, where the required pseudorandom numbers for encryption are still generated by chaos, and substitutions of rows or columns of image in the permutation of plain images are determined by the designed random switch control mechanism
To increase the randomness of rearrangement of image pixels, a switch control mechanism is injected into the image confusion step, which can be used to determine whether a row or column transformation will be performed on plain images. e switch control mechanism can be designed as follows: (a)
Summary
Mass data transmission on various communication networks has led to a security risk in multimedia data. With the further study of chaotic systems, more and more image encryption schemes based on higher-dimensional chaotic systems, especially for hyperchaos and spatiotemporal chaos, emerge gradually [13, 30,31,32]. Most of these schemes have a high level of security, as opposed to a high implementation cost. En, performance comparisons with some existing image schemes are carried out by using information entropy along with other indicators to show the superiority of the proposed image encryption algorithm.
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